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US 12,109,285 B2Granted
Zinc phosphate complex for oral care
AssigneeColgate-Palmolive Company
InventorsBaohua Qiao, Long Pan, Gregory Szewczyk, Ravi Subramanyam
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Abstract
An oral care composition having a soluble zinc polyphosphate complex made by combining ingredients including an inorganic zinc salt, and a plurality of long chain polyphosphates having 6 or more phosphate polymer units, the relative amount of inorganic zinc salt and long chain polyphosphates providing a phosphorus to zinc mole ratio of at least 6:1. Further provided is a method of treating a subject suffering from dentinal sensitivity applying the oral care composition to the teeth and gums of the subject.
Claims3
An oral care composition, comprising:
- a soluble zinc polyphosphate complex where the phosphorous to zinc mole ratio of the complex is 20:1, wherein the complex is made by combining zinc chloride and sodium hexametaphosphate and a solvent, wherein the solvent is water,
- wherein the zinc chloride and the sodium hexametaphosphate are in sufficient amounts to provide a 20:1 mole ratio of phosphorus to zinc in the recited complex;
- wherein when the soluble zinc polyphosphate complex is mixed with a protein a precipitate forms that can occlude dentinal tubules.
Dependencies are inferred from the claim text.